Vertical trip-hammer



STE-BBINS & HOLMES. Drop Hammer.

No. 8,989. Patented June 1, I852.

N. PETERS Phclo-Ulhugraphar. Waxhingmm 0.0.

UNITED STATES PATENT QFFTQE.

PETER STEBBINS AND JOHN HOLMES, OF SOHENEOTADY, NEW YORK.

VERTICAL TRIP-HAMMER.

Specification of Letters Patent No. 8,989, dated. June 1, 1852.

To all whom it may concern:

Be it known that we, PETER STEnnINs and JOHN HOLMES, both ofSchenectady, in the county of Schenectady and State of New York, haveinvented certain new and useful Improvements in Trip-Hammers; and we dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, forming part of this specification, in which Figure 1 is afront elevation of one of our improved trip hammers; this view shows thehammer in an elevated position, and ready to give a light blow. And alsoshows the position that the recessed rollers occupy, when it is desiredto give a very powerful blow, in dotted lines. Fig. 2, is a verticaltransverse section of the same, taken in the line m, m, in Fig. 1. Fig.3, is a detached view showing the lifting rollers and the hammer insection, and the position that one of the rollers occupies, when thrownout by the recessed rollers, in red lines, which are somewhatexaggerated so as to show more distinctly the manner in which the hammeris allowed to fall and assume the position shown in dotted lines. Fig.4, is a detached section of one of the recessed and plain rollers thatcause the lifting rollers to take hold of the handle of the hammer whenit is desired to raise it, the dotted lines in the view showing theposition of the revolving shaft and plain roller when the hammer isfalling, and Fig. 5, represents a broken vertical section, taken in theline 1, y, in

Fig. 1, this view shows aportion of the: frame and one of the slidingboxes and.

springs for operating upon, or causing them to slide 1n, after thehammer has fallen.

periphery of the recessed rollers of difierent lengths; or rather makingthe first recess extend nearly one half the distance around thecircumference of the recessed rollers, the second recess one third, andthe third recess one quarter the distance around the same, according tothe force of blow required. To accomplish this object effectually it isnecessary for the recessed rollers to be movable so as to slide on theirshaft back and forth; when the lever is raised or lowered.

To enable others skilled in the art to make and use our invention wewill now proceed to describe more fully its construction and operation.

A, represents the frame which may be of the form represented, or of any.other more suitable.

B, B, are the horizontal shafts on which the lifting rollers C, Crecessed and plain rollers D, D, D D are hung or secured. The shafts B,which we will suppose to be on the front part of the machine, has itsjournals secured and turning in stationary bearings or boxes a, a, ofthe frame A, and on the first shaft the lifting roller C, is secured,near its center, and also the two recessed rollers D, D. Secured on it,near its ends, these rollers all turn with the revolving shaft B. Byexamining the drawing Figs. 1, 2, and 3, the peculiar form of therollers D, D, will be clearly seen, these rollers may each have one,two, three, or more recesses Z), c, d, out in their periphery, and thatlettered b, may be double the length of that lettered (Z, and thatlettered a, may be one third longer than that d; the object in makingthese recesses of different lengths around the periphery of the rollers,is that of regulating the blow of the hammer when it is desired to forgedifferent kinds of work. It will be understood if it is desired to forgelight work it is not necessary to change the position of the recessedrollers D as they are now in the position to give the j lightest blow,but if it is desired to forge Similar letters of reference indicatecorrev sponding parts in each of the several figures.

The nature of our invention consists 1st; In the employment of recessedrollers, which operate in combination with plain rollersf springs, andsliding boxes, etc., for controlling the operation of the liftingrollers. 2nd. In regulating the force or blow of? the hammer, by makingthe recesses in the,

heavy work and a very powerful blow of the hammer is required, it willbe necessary for the operator to lay hold of the lever E, and pull orpress it down to the position shown in dotted lines in Fig. 1; this willcause the shifting bar E, to which the lever is attached, to slide,horizontally, and assume the position shown by dotted lines in the samefigure; thereby causing the recessed rollers D, D, Which are connectedto this shifting bar E, by forks s, s, which fit around the collars p,p, of the said rollers in the manner represented in Figs. 1 and 2; toassume or occupy the position shown, in black dotted lines and to act incombination with the plain rollers D. When this has taken place thelever is secured under the stop or projections e, or i, and the machineis set in operation. The. other horizontal shaft B which is back of thatB, has its journals secured and turning in movable bearings or boxes f,and has the lifting roller C secured on it, in line with that 0, andhas, also, the plain rollers D secured on it, near its ends anddirectlyopposite the recessed rollers, in such a position that no matterwhat may be the position of the reso placed or arranged that they aremade to bear on, or touch one end of the sliding or movable boxes inwhich the journals of the shaft B are secured. The object of thesesprings is that of forcing or pressing the shaft B, or boxes f, back totheir proper position, as the hammer is being raised, and also allowingthe shaft B, and boxes f, to be forced outward to the position shown inred lines in Fig. 5, so as to permit the hammer to fall to its positionon the anvil at the proper time.

Z, m, n, 0, are rollers which serve to guide shaft I, of the hammer I,and also to diminish friction when the hammer is rising or falling.

Operation: We will suppose the hammer to be raised nearly the desiredheight, and that the recessed rollers, are about to assume the positionshown in dotted lines in Fig. 4:; As soon as the recessed rollers haveoccupied the position just mentioned, the boxes 7, shaft B, liftingroller 0, and springs II, will occupy the position shown in red lines inFigs. 3, and 5; the projections of the recessed rollers having causedthe lifting roller 0, and plain rollers D, D, to recede from the rollerson the shaft B, and consequently the hammer is allowed to fall. As soonas the hammer falls the springs H, expand and operate upon the shaft B,upon which the lifting roller C, and plain rollers D, D, are hung, andcause it to be thrown toward the shaft B, and also cause the liftingroller in connection with that O, to grip the handle I, of the hammer,and again raise it. As the hammer is being raised the power from thesprings keep the rollers close together and cause them to grip thehandle of the hammer more firmly.

The objects effected by the use of our hammer are these: 1st. Thishammer can be constructed very cheap and at the same time be verydurable. It is not liable to get out of order as it is very simple andcompact and is very effectual in its operation. 2nd. Any degree of blowmay be obtained by the use of our hammer, for by the simple manner ofconstructing, also regulating the position of the recessed rollers, anydegree of blow required can be obtained in the shortest space of timeand without much delay.

This machine may be either driven by hand or steam power, motion beingcommunicated to the pulley K, which communicates mot-ion to the coggearing L, L, arranged on the shafts B B.

We are aware that vertical trip hammers elevated by friction rollers arenot new; neither are cams for regulating the elevation to which suchhammers shall be lifted, and therefore we do not claim them, but

lVhatwe do claim as our invention and desire to secure by Letters Patentis,

1. The recessed rollers D, D, in combination with the plain rollers D,D, and

springs H, or their equivalents, for controlling the operation of thelifting rollers, the projections on the Y of said recessed rollerscausing the shaft B, lifting roller 0, and plain rollers, D, D, torecede or move from the rollers on the shaft B, and thereby allow of thehammer fall, the whole being constructed and arranged and operatingsubstantially as herein described.

2. The manner herein described of regulating the blow of the hammer bymaking the recesses b, 0, cl, in the periphery of the rollers D, D,ofunequal lengths, and making the said rollers movable on their shaft,so that either projection can be brought opposite to and made to act incombination with the plain rollers D, D, in the manner herein set forth.

. hi PETER sTEBBINs.

JOSEPH HENFALL, M. V. BOUCK.

